CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers (CVE-2026-100368) | HOL Guard CVE

High · CVSS 8.4CVE-2026-100368

CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers

Answer in brief

CVE-2026-100368 records a High severity (CVSS 8.4) vulnerability in CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers. The current sources do not mark it as known exploited. The current feed maps alastairlundy/CliInvoke.Specializations (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps alastairlundy/CliInvoke.Specializations (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
alastairlundy/CliInvoke.Specializationsgeneric	>=2.2.0 <=2.8.4 \|\| >=2.9.0 <=2.9.3 \|\| >=2.10.0 <=2.10.4 \|\| >=3.0.0-alpha.1 <=3.0.0-alpha.4 \|\| >=3.0.0-alpha.8 <=3.0.0-alpha.10 \|\| >=1.0.0-rc.1 <=1.6.1.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for alastairlundy/CliInvoke.Specializations.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source description

CliInvoke is a .NET library for invoking command-line programs, and its `CliInvoke.Specializations` packages provide specialized wrappers for shells such as PowerShell and Windows Command Prompt. `CliInvoke.Specializations` versions 2.2.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, 3.0.0-alpha.1 through 3.0.0-alpha.4, and 3.0.0-alpha.8 through 3.0.0-alpha.10, as well as `AlastairLundy.CliInvoke.Specializations` versions 1.0.0-rc.1 through 1.6.1.1, contain an OS command injection vulnerability in their PowerShell and Cmd wrappers. The wrappers pass a caller-controlled target and arguments to `pwsh -Command` or `cmd /c` using a single `ProcessStartInfo.Arguments` string, allowing a double quote in untrusted input to break operating-system-level quoting and cause the shell to execute an additional command with the host process's privileges. The vulnerability is patched in `CliInvoke.Specializations` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.1, and in `AlastairLundy.CliInvoke.Specializations` version 2.0.2. No complete workaround is available; users unable to upgrade should reject or remove double quotes from target paths and arguments, additionally reject shell metacharacters in versions 2.2.0 through 2.9.2 and 3.0.0-alpha.1 through 3.0.0-alpha.4, or bypass the PowerShell and Cmd wrappers and invoke target processes directly when handling untrusted input.

Quoted source text, attributed separately from HOL analysis.